Using Back-Scattering to Enhance Efficiency in Neutron Detectors

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ID: 269759
2017
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Abstract
The principle of using strongly scattering materials to recover efficiency in detectors for neutron instruments, via back-scattering of unconverted thermal neutrons, is discussed in general. The feasibility of the method is illustrated through Geant4-based simulations involving thermal neutrons impinging on a specific setup with a layer of polyethylene placed behind a single-layered boron-10 thin film gaseous detector. The results show that detection efficiencies can be as much as doubled in the most ideal scenario, but with associated adverse contributions to spatial and timing resolution of respectively centimetres and tens of microseconds. Potential mitigation techniques to contain the impact on resolution are investigated, and are found to alleviate the issues to some degree, at a cost of reduced gain in efficiency.
Reference Key
hall-wilton2017ieeeusing Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors T. Kittelmann,K. Kanaki,Esben Bryndt Klinkby,X. X. Cai,C. P. Cooper-Jensen,R. Hall-Wilton;T. Kittelmann;K. Kanaki;Esben Bryndt Klinkby;X. X. Cai;C. P. Cooper-Jensen;R. Hall-Wilton;
Journal ieee transactions on nuclear science
Year 2017
DOI
10.1109/tns.2017.2695404
URL
https://sciprofiles.com/publication/view/5c250df5fa8d10d5c8ef614b5e11e162
Keywords
polyethylene europe instruments scattering neutrons detectors substrates

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